package com.itheima.controller.impl;

import com.itheima.controller.IStudentController;
import com.itheima.domain.Student;
import com.itheima.factory.Factory;
import com.itheima.service.IStudentService;

import java.util.ArrayList;
import java.util.Scanner;

public class IStudentControllerImpl  implements IStudentController{
    private IStudentService StudentService = Factory.getStuService();
    private Scanner sc = new Scanner(System.in);
    @Override
    public void start() {
        loop:
        while (true) {
            System.out.println("--------欢迎来到 <学生> 管理系统--------");
            System.out.println("请输入您的选择: 1.添加学生  2.删除学生  3.修改学生  4.查看学生  5.退出");
            String choice = sc.next();
            //switch
            switch (choice) {
                case "1":
                    addStudent();
                    break;
                case "2":
                    deleteStudent();
                    break;
                case "3":
                    updateStudent();
                    break;
                case "4":
                    findAllStudents();
                    break;
                case "5":
                    System.out.println("回到主菜单");
                    return;
                default:
                    System.out.println("输入有误");
            }
        }
    }

    @Override
    public void addStudent() {
        System.out.println("请输入学号");
        String sid = null;
        while (true) {
            sid = sc.next();
            boolean isExists = StudentService.isExists(sid);
            if (isExists) {
                System.out.println("已经存在请重新输入");
            } else {
                break;
            }
        }
        Student Student = getStudentInfo(sid);
        StudentService.addStudent(Student);
        System.out.println("新增成功");
    }

    @Override
    public void deleteStudent() {
        String sid = getSid();
        StudentService.deleteStudent(sid);
        System.out.println("删除成功");
    }

    @Override
    public void updateStudent() {
        String sid = getSid();
        Student Student = getStudentInfo(sid);
        StudentService.updateStudent(sid, Student);
        System.out.println("修改成功");
    }

    private Student getStudentInfo(String sid) {
        System.out.println("请输入姓名");
        String name = sc.next();
        System.out.println("请输入年龄");
        int age = sc.nextInt();
        System.out.println("请输入生日");
        String birthday = sc.next();
        Student Student = new Student(sid, name, age, birthday);
        return Student;
    }

    @Override
    public void findAllStudents() {
        ArrayList<Student> list = StudentService.findAllStudents();
        if (list == null || list.size() == 0) {
            System.out.println("没有数据,请先添加");
            return ;
        }

        System.out.println("学号\t姓名\t年龄\t生日");
        for (int i = 0; i < list.size(); i++) {
            Student Student = list.get(i);
            System.out.println(Student.getSid() + "\t" + Student.getName() + "\t" + Student.getAge()
                    + "岁\t" + Student.getBirthday());
        }
    }

    private String getSid() {
        System.out.println("请输入学号");
        String sid = null;
        while (true) {
            sid = sc.next();
            boolean exists = StudentService.isExists(sid);
            if (exists) {
                break;
            } else {
                System.out.println("不存在,请重新录入");
            }
        }
        return sid;
    }
}
